package com.qianseit.westore.ui;

import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class MyScrollView extends ScrollView {

	private GestureDetector mGestureDetector;
	
	public MyScrollView(Context context) {
		super(context);
		mGestureDetector = new GestureDetector(context, new YScrollDetector());
        setFadingEdgeLength(0);
	}

	public MyScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
		mGestureDetector = new GestureDetector(context, new YScrollDetector());
        setFadingEdgeLength(0);
	}

	public MyScrollView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		mGestureDetector = new GestureDetector(context, new YScrollDetector());
        setFadingEdgeLength(0);
	}

	@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {
		return super.onInterceptTouchEvent(ev) && mGestureDetector.onTouchEvent(ev);
	}

	class YScrollDetector extends SimpleOnGestureListener {
    	@Override
    	public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            if (Math.abs(distanceY) > Math.abs(distanceX)) {
            	return true;
            }
            return false;
    	}
    }
	
}
